1.Dễ
Quang hợp diễn ra ở bào quan nào?
- ABộ máy Golgi
- BLục lạp
- CNhân
- DTy thể
2.Dễ
In which form do animals store glucose in the liver and muscles?
- AGlycogen
- BStarch
- CCellulose
- DChitin
3.Dễ
What is a monosaccharide?
- AA single sugar unit, such as glucose
- BA chain of many amino acids
- CTwo sugars joined together, such as sucrose
- DA fat made of glycerol and fatty acids
4.Trung bình
Which stage of aerobic respiration produces the most ATP?
- AThe electron transport chain
- BFermentation
- CGlycolysis in the cytoplasm
- DThe Krebs cycle in the matrix
5.Trung bình
When most people in a community are vaccinated, people who cannot be vaccinated are also protected. Why?
- AVaccinated people make antibodies for others
- BThe vaccine spreads from person to person
- CThe pathogen has too few hosts to spread easily
- DThe pathogen mutates into a harmless form
6.Trung bình
What happens in the lytic cycle of a virus?
- AThe host cell makes antibodies against the virus
- BThe viral DNA joins the host DNA and stays inactive for a long time
- CThe virus makes many copies in the host cell, which then bursts
- DThe virus divides by binary fission outside the cell
7.Khó
A green plant is kept in a sealed jar in complete darkness for a day. What happens to the carbon dioxide level in the jar?
- AIt stays the same, because plants do not respire
- BIt rises, because the plant respires but cannot photosynthesise
- CIt falls, because the plant keeps photosynthesising
- DIt falls, because plants take in more CO₂ when they respire in the dark
8.Khó
A study finds that coffee drinkers have more lung cancer. Later it is found that coffee drinkers in the study also smoked more. What is smoking in this study?
- AA placebo
- BA confounding variable
- CThe dependent variable
- DThe control group
Đáp án
- 1. B · Lục lạp
- 2. A · Glycogen
- 3. A · A single sugar unit, such as glucose
- 4. A · The electron transport chain
- 5. C · The pathogen has too few hosts to spread easily
- 6. C · The virus makes many copies in the host cell, which then bursts
- 7. B · It rises, because the plant respires but cannot photosynthesise
- 8. B · A confounding variable
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